140 On the Transformations of the Red Mites. [ March, 
locustarum was first proposed for it by B. D. Walsh} but Dr. Le 
Baron afterwards gave it the name of Atoma nee, in con- 
nection with a detailed description. 
Active when they first hatch and impelled by instinct, these 
Fig. 1—Yrombidium locustarum :—a, female with her batch of eggs (after 
Emė leas 6, newly hatched Jarva— natural size indicated by the dot within the cir- 
cle; G egg; ‘d, e, vacated egg-shells (after Riley). 
little six-legged specks crawl upon the locusts and B to 
them, mostly at the base of the wings or along their principal 
veins, just as a tick fastens to a dog, or a sheep, or to man. Thus 
attached to their victim they suck its juices and swell until the 
legs become invisible. It is in this condition (Fig. 24) that they 
— Ti mene locustarum :—a, mature larva when about to leave the "i 
- d, female—the natura 
1 Practical Sak ipa 
Le Baron’s Second Illinois a won 1872, p. 156. The author employs the 
_ term Avoma, which, though at first employed by Latreille, is corrected to Astoma 
in his Genera Crustaceorum et Insectorum, I, p. 162 (1806 : 
